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(More customer reviews)I own a great deal of glass... lenses litter my office. Most of the lenses I'm glad I purchased and a few, well, those go to the Land of Ebay. This one, however, will never be far from my camera(s). I owned the predecessor, the 17-70 f/2.8-4.5 HSM, an excellent lens and a supreme value. Effectively, a 25-105mm, perfect walkabout lens with Macro capability - equally adept at the candid portrait as well as the quick nature shot. Images post process quite well. So, it was a bit of trepidation that I purchased the updated lens... would it perform as well? Would the OS (Image stabilization built into the lens) be effective? Is it still a great value Nikon lens? Fortunately, the answer to all three questions is a resounding yes. If anything, images are a bit sharper out of camera. OS is effective from 2-3 stops. And absolutely, this lens is a phenomenal value especially compared to the fantastic 17-55mm f/2.8 NIKON lens priced at a healthy four figures. So unless you're loaded and/or totally convinced that only Nikon glass can work effectively on Nikon bodies, consider this lens for your arsenal. It's a strong step up from the kit lenses and a healthy competitor to the venerable 17-55mm.
Click Here to see more reviews about: Sigma 17-70mm f/2.8-4 DC Macro OS HSM Lens for Nikon Mount Digital SLR Cameras
Sigma Corporation adds unique, anti-shake technology to award-winning 17-70mm lens Sigma announced the new Sigma 17-70mm F2.8-4 DC MACRO OS HSM. This large aperture standard zoom lens offers an aperture of F2.8 at the 17mm focal length and is ideal for many situations such as portraits, sports, macro and general photographyThe OS (Optical Stabilizer) function offers the use of shutter speeds approximately 4 stops slower than would otherwise be possible.The maximum aperture of F2.8 makes this lens ideal for hand held photography as well as producing an attractive background blur and high speed auto focus.This lens has a minimum focusing distance of 22cm (8.7..) throughout the entire zoom range and maximum magnification ratio of 1:2.7, making it ideal for close-up photography. It is possible to focus as close as approximately 4.7cm from the tip of the lens to the subject making this lens particularly useful for close-up photography.Three aspherical lenses and one ELD (Extraordinary Low Dispersion) glass element provide excellent correction for all types of aberrations. High image quality is assured throughout the entire zoom range. The Super Multi-Layer Coating reduces flare and ghosting and provides high contrast images.The incorporation of HSM (Hyper Sonic Motor) ensures a quiet and high speed AF. This lens has a rounded 7 blade diaphragm which creates an attractive blur to the out of focus areas of the image
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